Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
-
Economics & Finance
How to create an Ellipse with progress cursor on hover over objects using FabricJS?
In this tutorial, we are going to create an Ellipse with a progress cursor on hover over objects using FabricJS. Progress is one of the native cursor styles available, which can be used in the FabricJS canvas too. FabricJS provides various types of cursors like default, all-scroll, crosshair, col-resize, row-resize etc. which are reusing the native cursor underhood. The hoverCursor property sets the style of the cursor when hovered over a canvas object.
Syntax
new fabric.Ellipse({ hoverCursor: String }: Object)
Parameters
-
options (optional) ? This parameter is an Object which provides additional customizations to our ellipse. Using this parameter, properties such as color, cursor, stroke width, and a lot of other properties can be changed related to the object of which hoverCursor is a property.
Options Keys
-
hoverCursor ? This property accepts a String which determines the name of the cursor to be used on hovering over the canvas object. By using this property, we can set the default cursor value when hovering over the ellipse object on the canvas.
Example 1: Passing the hoverCursor Key to the Class
By default, when we hover over an ellipse object in the canvas, the cursor type is "move". Let's see an example, to create a canvas with a progress cursor while hovering over an ellipse object in FabricJS.
<!DOCTYPE html>
<html>
<head>
<!-- Adding the Fabric JS Library-->
<script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/510/fabric.min.js"></script>
</head>
<body>
<h2>Creating an Ellipse with progress cursor on hover over objects using FabricJS</h2>
<p>Hover the mouse over the ellipse to see the <b>progress</b> cursor. </p>
<canvas id="canvas"></canvas>
<script>
// Initiate a canvas instance
var canvas = new fabric.Canvas("canvas");
// Initiate an ellipse instance
var ellipse = new fabric.Ellipse({
left: 115,
top: 100,
fill: "#b22222",
rx: 80,
ry: 50,
stroke: "black",
strokeWidth: 5,
hoverCursor: "progress",
});
// Adding it to the canvas
canvas.add(ellipse);
canvas.setWidth(document.body.scrollWidth);
canvas.setHeight(250);
</script>
</body>
</html>
Example 2: Demonstrating Instance-Specific Effect
In this example, we are passing the hoverCursor key to the ellipse class which means that the hoverCursor property would not be changed for every object in the canvas. Changes will only occur for that single object.
<!DOCTYPE html>
<html>
<head>
<!-- Adding the Fabric JS Library-->
<script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/510/fabric.min.js"></script>
</head>
<body>
<h2>Creating an Ellipse with progress cursor on hover over objects using FabricJS</h2>
<p>Hover the mouse over the objects. You will get to see the <b>progress</b> cursor on the left ellipse. We haven't applied the <b>hoverCursor</b> property to the right ellipse. </p>
<canvas id="canvas"></canvas>
<script>
// Initiate a canvas instance
var canvas = new fabric.Canvas("canvas");
// Initiate an ellipse instance
var ellipseOne = new fabric.Ellipse({
left: 115,
top: 100,
fill: "#b22222",
rx: 80,
ry: 50,
stroke: "black",
strokeWidth: 5,
hoverCursor: "progress",
});
// Initiate another ellipse instance
var ellipseTwo = new fabric.Ellipse({
left: 335,
top: 100,
rx: 80,
ry: 50,
stroke: "#8b0000",
strokeWidth: 5,
fill: "black",
});
// Add them to the canvas
canvas.add(ellipseOne);
canvas.add(ellipseTwo);
canvas.setWidth(document.body.scrollWidth);
canvas.setHeight(250);
</script>
</body>
</html>
Key Points
- The
hoverCursorproperty only affects the specific object it's applied to - Common cursor values include: "default", "pointer", "progress", "crosshair", "move", "text", etc.
- The progress cursor typically shows a spinning wheel or hourglass, indicating a loading state
- Without setting
hoverCursor, FabricJS uses the default "move" cursor for draggable objects
Conclusion
The hoverCursor property in FabricJS allows you to customize the cursor appearance when hovering over specific canvas objects. Use "progress" cursor to indicate loading states or processing activities on your ellipse objects.
184 Views
